SIM card pin definition
Transfer from:
The commonly used SIM card holder is 6 feet, as shown in the figure (web screenshot):
The pin used by is:
SIMVCC; SIMRST; SIMCLK; SIMDATA (I/O); SIMGND; VPP can be left floating;
The general pin can be pulled up to SIMVCC or pulled down to the ground, please refer to the design reference of the module;
For example: RST generally needs to be pulled up; CLK generally needs to be pulled down; DATA generally needs to be pulled up;
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